Vehicle Road Simulation Test Method and System for Simulating Current Signal of Electronically Controlled Vibration Damper

Abstract

This invention discloses a method and system for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test. The method includes: acquiring the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different operating conditions during vehicle operation; selecting the current load signal corresponding to the iterative operating condition based on the vehicle signal under the current iterative operating condition, thereby controlling the action of the electronically controlled shock absorber; performing synchronous simulation iterations in conjunction with the wheel six-component force load signal of the corresponding iterative operating condition; comparing the iteration results with a set fixed value until the iteration target requirement is met. By testing random current load signals under all operating conditions and simultaneously acquiring the wheel six-component force load signal, the current signal of the electronically controlled random load under different operating conditions is simulated, ensuring that the vehicle attitude, the internal electronic control signals of the active suspension system, and the vehicle's road driving state remain consistent under different operating conditions, thus ensuring the accuracy of the vehicle road simulation test.

Description

Technical Field

[0001] This invention relates to the field of vehicle road simulation technology, and in particular to a method and system for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, vehicle road simulations with semi-active or active suspension systems are in their early stages or are used directly as traditional suspensions, resulting in significant differences in chassis performance parameters and attitude compared to actual vehicle driving on the road. Vehicle proving ground road tests can adjust the current signal of the electronically controlled shock absorbers in the semi-active or active suspension system in real time according to different road conditions and vehicle attitude, but the test cycle is relatively long.

[0004] Vehicle bench road simulation testing has an advantage over vehicle test tracks in terms of verification cycle. However, it requires not only simulating wheel loads (wheel center acceleration or wheel six-component loads) but also simulating and synchronizing the damper current signal that affects the internal load. If the two cannot be simulated in complete synchronization, it will lead to excessively strong or weak chassis internal loads and chassis-body connection point durability tests, failing to achieve the purpose of bench road simulation replacing vehicle verification, or even misleading product design.

[0005] Currently, vehicle road test simulators can only simulate wheel loads (wheel center acceleration or wheel six-component force), and cannot simulate vehicle attitude and damper damping characteristics in real time. Furthermore, when a vehicle is mounted on a vehicle road test simulator, the current signal of the electronically controlled damper cannot be adjusted through driving motion parameters, resulting in inconsistencies between the internal load simulated on the test bench and the load tested on the vehicle road, which cannot meet the requirements for vehicle durability verification. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes a vehicle road simulation test method and system for simulating the current signal of an electronically controlled shock absorber. By testing the current load signal under all operating conditions and simultaneously acquiring the six-component force load signal of the wheels, the current signal of the electronically controlled random load under different operating conditions is simulated. This ensures the consistency between the vehicle's attitude, the internal electronic control signal of the active suspension system, and the vehicle's road driving state under different operating conditions, thereby guaranteeing the accuracy of the vehicle road simulation test.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a method for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test, comprising:

[0009] Acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation;

[0010] Based on the vehicle signals under the current iterative operating condition, the current load signal corresponding to the iterative operating condition is selected to control the action of the electronically controlled shock absorber. Synchronous simulation iteration is performed in combination with the wheel six-component force load signal corresponding to the iterative operating condition. The iteration result is compared with the set fixed value until the iteration target requirement is met.

[0011] As an alternative implementation, the vehicle signals include vehicle speed signal, braking signal, steering wheel angle signal, driving mode, vehicle body acceleration, and wheel acceleration.

[0012] As an alternative implementation, the current load signal of the electronically controlled vibration damper is acquired by a Hall current sensor connected to the solenoid valve of the electronically controlled vibration damper.

[0013] As an alternative implementation, the Hall current sensor includes 5 pins, wherein pins 1 and 2 are connected in series to the solenoid valve of the electronically controlled vibration damper, pin 3 is connected to the cable providing 5V excitation voltage, pin 4 is connected to the electronic control signal cable, pin 5 is grounded, and pins 3 to 5 are all connected to the data acquisition module.

[0014] As an alternative implementation, the iteration results include root mean square and relative damage ratio.

[0015] As an alternative implementation, the root mean square and relative damage ratio are compared with their respective fixed values. If both are less than or equal to the fixed values, the iteration ends; otherwise, the iteration continues until the iteration target is achieved.

[0016] As an alternative implementation, when the RPC interface under the iterative working condition is completely consistent with the preset interface, the electronically controlled vibration damper is simulated with an electronically controlled signal output based on the selected current load signal, and synchronous simulation iteration is performed in combination with the wheel six-component force load signal of the corresponding iterative working condition.

[0017] Secondly, the present invention provides a vehicle road simulation test system for simulating the current signal of an electronically controlled shock absorber, comprising:

[0018] The data acquisition module is configured to acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation.

[0019] The collaborative control test module is configured to select the current load signal corresponding to the iterative condition based on the vehicle signal under the current iterative condition, thereby controlling the action of the electronically controlled shock absorber. It also performs synchronous simulation iteration by combining the wheel six-component force load signal of the corresponding iterative condition, and compares the iteration result with the set fixed value until the iteration target requirement is met.

[0020] Thirdly, the present invention provides an electronic device including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the method described in the first aspect.

[0021] Fourthly, the present invention provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method described in the first aspect.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention proposes a method and system for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test. A Hall current sensor is connected in series with the electronically controlled shock absorber, and random current load signals under all operating conditions are tested according to vehicle durability specifications. Simultaneously, the six-component force load signals of the wheels are collected. Based on the collected real-time current load signals, the current signal of the electronically controlled random load of the shock absorber is controlled to simulate the current signal of the electronically controlled random load under different operating conditions. This ensures that the vehicle attitude, the internal electronic control signals of the active suspension system, and the vehicle's road driving are consistent under different operating conditions. Furthermore, the internal electronic control signals of the active suspension system are simulated and kept synchronized while iterating the six-component force load on the road simulation test machine, ensuring the accuracy of the vehicle road simulation test.

[0024] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a wiring diagram of the active suspension system load spectrum acquisition and testing system and external Hall current sensor provided in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the active suspension system electronic control signal and the vehicle bench RPC collaborative control test system provided in Embodiment 1 of the present invention;

[0028] Figure 3The control flowchart of the integrated collaborative control test system provided in Embodiment 1 of the present invention is shown. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that the terms “comprising” and “including”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0032] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0033] Example 1

[0034] This embodiment provides a method for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test, including:

[0035] Acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation;

[0036] Based on the vehicle signals under the current iterative operating condition, the current load signal corresponding to the iterative operating condition is selected to control the action of the electronically controlled shock absorber. Synchronous simulation iteration is performed in combination with the wheel six-component force load signal corresponding to the iterative operating condition. The iteration result is compared with the set fixed value until the iteration target requirement is met.

[0037] In this embodiment, based on the acquisition of the six-component wheel loads in the vehicle road load spectrum, a Hall current sensor is added to the solenoid valve cable end of the active suspension system in the vehicle. Random current signals of the active suspension system, such as the electronic control signals of the CDC damper and air spring, are measured on public roads and test sites according to the requirements of the vehicle test specifications, under specified road surface and corresponding vehicle speed.

[0038] Specifically:

[0039] Typically, during the vehicle design process, the vehicle ECU is directly connected to the electronically controlled shock absorber. Based on vehicle signals (including vehicle speed signal, braking signal, steering wheel angle signal, driving mode, vehicle acceleration, wheel acceleration, etc.), the ECU sends current signals to the electronically controlled shock absorber to control and change the damping parameters or other electronically controlled parameters of the shock absorber.

[0040] To acquire the current load signal of the electronically controlled shock absorber, this embodiment connects Hall current sensors in series with the solenoid valve between the vehicle ECU and the electronically controlled shock absorber. These sensors are connected to the electronically controlled shock absorber according to pin definitions, designated as Hall current sensors #1, #2, #3, and #4. Simultaneously, the Hall current sensors are connected to the excitation voltage, signal line, and ground line according to pin definitions and then connected to a data acquisition device. Figure 1 As shown.

[0041] For example, a Hall current sensor #1 is added between the left front electronically controlled shock absorber and the vehicle ECU. The Hall current sensor #1 has 5 pins. Pins ① and ② are directly connected in series with the input line of the solenoid valve cable of the electronically controlled shock absorber. Pin ③ is connected to the data acquisition device and provides a 5V excitation voltage cable. Pin ④ is connected to the data acquisition device and collects the signal cable of the electronic control signal. Pin ⑤ is connected to the data acquisition device and provides a grounding cable.

[0042] Similarly, Hall current sensors #2, #3, and #4 are connected to the vehicle ECU and the right front electronically controlled shock absorber, left rear electronically controlled shock absorber, and right rear electronically controlled shock absorber, respectively, to ensure accurate measurement of the electronic control signals of the vehicle's electronically controlled shock absorbers.

[0043] Simultaneously, four wheel force sensors—the left front wheel force sensor, the right front wheel force sensor, the left rear wheel force sensor, and the right rear wheel force sensor—are connected to the data acquisition device to collect and record data in real time on different road surfaces. When the data acquisition device is activated, it ensures real-time synchronous acquisition of the current load signal of the electronically controlled shock absorber and the wheel force load signal without any timing lag during the vehicle's movement.

[0044] In this embodiment, based on Figure 1 Acquire current load signals and wheel six-component force load signals under different operating conditions during vehicle operation. Perform iterative and durability tests on the wheel six-component force load signals using an existing control system RPC. Simulate real-world current signals under different operating conditions using an embedded control system. Figure 2 As shown, the integrated collaborative control test system determines the next embedded control system operation step and the magnitude of the simulated current based on the color change of a specified area on the interface when operating the RPC control system.

[0045] like Figure 3 The diagram shows the control flow of the integrated collaborative control test system. It mainly reads the working folder containing the current load signal of the electronically controlled shock absorber and the six-component force load signal of the wheel, and performs logical judgments and sequential operations to identify whether the "Run" icon in the RPC operation interface is successful, so as to ensure that the RPC system and the embedded control system maintain timing synchronization.

[0046] Specifically:

[0047] Start the RPC control system and the integrated collaborative control test system. After startup, the embedded control system reads the RPC iterative working condition folder, selects the current load signals of the corresponding iterative working conditions such as Belgian Road, Rope Road, and Square Pit Road, and prepares for the output of the current load signals.

[0048] Then, the integrated collaborative control test system performs corresponding sequential operations according to the changes in the RPC operation interface. When the "Run" icon in the RPC operation interface is captured, the embedded control system will simulate the output of electronic control signals to the electronically controlled vibration damper according to the current load signal selected in the previous step, and simultaneously start the MTS RPC remote parameter control iteration system, using the wheel six-component force load signal of the corresponding iteration condition as the target signal for iteration. The basic process of iteration can be referred to the MTS RPC remote parameter control iteration instructions.

[0049] After each iteration, the MTS RPC remote parameter control system automatically calculates the iteration results, including the root mean square and the relative damage ratio. The iteration results are compared with the set fixed values. If all are less than or equal to a certain fixed value, the iteration ends; otherwise, the RPC continues to iterate, and the integrated collaborative control test system continues to capture the "Run" icon in the RPC operation interface and simulate the output electronic control signals. After multiple iterations, the iteration stops when the iteration results reach the set acceptable range.

[0050] Since the vehicle on the road simulation test machine is in a quasi-stationary or zero-speed state, it cannot provide data to the central control unit and issue corresponding commands to the solenoid valves. Therefore, this embodiment develops an embedded control system hardware and software module and simulates the current signals of random electronic loads under different operating conditions. This ensures that the vehicle attitude, the internal electronic control signals of the active suspension system, and the vehicle's on-road driving remain consistent under different operating conditions. Simultaneously, under the iterative six-component load of the road simulation test machine, the internal electronic control signals of the active suspension system are simulated and kept synchronized to ensure the accuracy of the vehicle road simulation test.

[0051] Example 2

[0052] This embodiment provides a method for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test, including:

[0053] The data acquisition module is configured to acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation.

[0054] The collaborative control test module is configured to select the current load signal corresponding to the iterative condition based on the vehicle signal under the current iterative condition, thereby controlling the action of the electronically controlled shock absorber. It also performs synchronous simulation iteration by combining the wheel six-component force load signal of the corresponding iterative condition, and compares the iteration result with the set fixed value until the iteration target requirement is met.

[0055] It should be noted that the above modules correspond to the steps described in Embodiment 1, and the examples and application scenarios implemented by the above modules and the corresponding steps are the same, but are not limited to the content disclosed in Embodiment 1. It should also be noted that the above modules, as part of the system, can be executed in a computer system such as a set of computer-executable instructions.

[0056] In further embodiments, the following is also provided:

[0057] An electronic device includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform the method described in Embodiment 1. For brevity, further details are omitted here.

[0058] It should be understood that in this embodiment, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0059] Memory may include read-only memory and random access memory, and provides instructions and data to the processor. A portion of memory may also include non-volatile random access memory. For example, memory may also store information about the device type.

[0060] A computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method described in Embodiment 1.

[0061] The method in Example 1 can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, a detailed description is not provided here.

[0062] Those skilled in the art will recognize that the units and algorithm steps described in conjunction with the embodiments herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0063] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test, characterized in that, include: Acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation; Based on the vehicle signals under the current iterative operating condition, the current load signal corresponding to the iterative operating condition is selected to control the action of the electronically controlled shock absorber. Synchronous simulation iteration is performed in combination with the wheel six-component force load signal corresponding to the iterative operating condition. The iteration result is compared with the set fixed value until the iteration target requirement is met.

2. The method for simulating the current signal of an electronically controlled vibration damper for a complete vehicle road simulation test as described in claim 1, characterized in that, The vehicle signals include vehicle speed signal, braking signal, steering wheel angle signal, driving mode, vehicle acceleration, and wheel acceleration.

3. The method for simulating the current signal of an electronically controlled vibration damper for a complete vehicle road simulation test as described in claim 1, characterized in that, The current load signal of the electronically controlled vibration damper is acquired by a Hall current sensor connected to the solenoid valve of the electronically controlled vibration damper.

4. The method for simulating the current signal of an electronically controlled shock absorber for a complete vehicle road simulation test as described in claim 3, characterized in that, The Hall current sensor has 5 pins. Pins 1 and 2 are connected in series to the solenoid valve of the electronically controlled vibration damper. Pin 3 is connected to the cable that provides the 5V excitation voltage. Pin 4 is connected to the electronic control signal cable. Pin 5 is grounded. Pins 3 to 5 are all connected to the data acquisition module.

5. The method for simulating the current signal of an electronically controlled shock absorber for a complete vehicle road simulation test as described in claim 1, characterized in that, The iteration results include root mean square and relative damage ratio.

6. The method for simulating the current signal of an electronically controlled shock absorber for a complete vehicle road simulation test as described in claim 5, characterized in that, The root mean square (RMS) and relative damage ratio are compared with their respective fixed values. If both are less than or equal to the fixed values, the iteration ends; otherwise, the iteration continues until the iteration target is achieved.

7. The method for simulating the current signal of an electronically controlled vibration damper for a complete vehicle road simulation test as described in claim 1, characterized in that, Once the RPC interface under the iterative working condition is completely consistent with the preset interface, the electronically controlled vibration damper is simulated with the selected current load signal, and synchronous simulation iteration is performed in combination with the wheel six-component force load signal of the corresponding iterative working condition.

8. A method for simulating the current signal of an electronically controlled shock absorber in a vehicle road simulation test, characterized in that, include: The data acquisition module is configured to acquire the current load signal of the electronically controlled shock absorber and the wheel six-component force load signal under different working conditions during the vehicle's operation. The collaborative control test module is configured to select the current load signal corresponding to the iterative condition based on the vehicle signal under the current iterative condition, thereby controlling the action of the electronically controlled shock absorber. It also performs synchronous simulation iteration by combining the wheel six-component force load signal of the corresponding iterative condition, and compares the iteration result with the set fixed value until the iteration target requirement is met.

9. An electronic device, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, perform the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, perform the method described in any one of claims 1-7.

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